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<FONT color="green">001</FONT>    /*<a name="line.1"></a>
<FONT color="green">002</FONT>     * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<FONT color="green">003</FONT>     * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
<FONT color="green">004</FONT>     * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<FONT color="green">005</FONT>     * The ASF licenses this file to You under the Apache License, Version 2.0<a name="line.5"></a>
<FONT color="green">006</FONT>     * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<FONT color="green">007</FONT>     * the License.  You may obtain a copy of the License at<a name="line.7"></a>
<FONT color="green">008</FONT>     *<a name="line.8"></a>
<FONT color="green">009</FONT>     *      http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<FONT color="green">010</FONT>     *<a name="line.10"></a>
<FONT color="green">011</FONT>     * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<FONT color="green">012</FONT>     * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<FONT color="green">013</FONT>     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<FONT color="green">014</FONT>     * See the License for the specific language governing permissions and<a name="line.14"></a>
<FONT color="green">015</FONT>     * limitations under the License.<a name="line.15"></a>
<FONT color="green">016</FONT>     */<a name="line.16"></a>
<FONT color="green">017</FONT>    <a name="line.17"></a>
<FONT color="green">018</FONT>    package org.apache.commons.math.linear;<a name="line.18"></a>
<FONT color="green">019</FONT>    <a name="line.19"></a>
<FONT color="green">020</FONT>    import java.io.Serializable;<a name="line.20"></a>
<FONT color="green">021</FONT>    <a name="line.21"></a>
<FONT color="green">022</FONT>    import org.apache.commons.math.MathRuntimeException;<a name="line.22"></a>
<FONT color="green">023</FONT>    <a name="line.23"></a>
<FONT color="green">024</FONT>    /**<a name="line.24"></a>
<FONT color="green">025</FONT>     * Implementation of RealMatrix using a double[][] array to store entries and<a name="line.25"></a>
<FONT color="green">026</FONT>     * &lt;a href="http://www.math.gatech.edu/~bourbaki/math2601/Web-notes/2num.pdf"&gt;<a name="line.26"></a>
<FONT color="green">027</FONT>     * LU decomposition&lt;/a&gt; to support linear system<a name="line.27"></a>
<FONT color="green">028</FONT>     * solution and inverse.<a name="line.28"></a>
<FONT color="green">029</FONT>     * &lt;p&gt;<a name="line.29"></a>
<FONT color="green">030</FONT>     * The LU decomposition is performed as needed, to support the following operations: &lt;ul&gt;<a name="line.30"></a>
<FONT color="green">031</FONT>     * &lt;li&gt;solve&lt;/li&gt;<a name="line.31"></a>
<FONT color="green">032</FONT>     * &lt;li&gt;isSingular&lt;/li&gt;<a name="line.32"></a>
<FONT color="green">033</FONT>     * &lt;li&gt;getDeterminant&lt;/li&gt;<a name="line.33"></a>
<FONT color="green">034</FONT>     * &lt;li&gt;inverse&lt;/li&gt; &lt;/ul&gt;&lt;/p&gt;<a name="line.34"></a>
<FONT color="green">035</FONT>     * &lt;p&gt;<a name="line.35"></a>
<FONT color="green">036</FONT>     * &lt;strong&gt;Usage notes&lt;/strong&gt;:&lt;br&gt;<a name="line.36"></a>
<FONT color="green">037</FONT>     * &lt;ul&gt;&lt;li&gt;<a name="line.37"></a>
<FONT color="green">038</FONT>     * The LU decomposition is cached and reused on subsequent calls.   <a name="line.38"></a>
<FONT color="green">039</FONT>     * If data are modified via references to the underlying array obtained using<a name="line.39"></a>
<FONT color="green">040</FONT>     * &lt;code&gt;getDataRef()&lt;/code&gt;, then the stored LU decomposition will not be<a name="line.40"></a>
<FONT color="green">041</FONT>     * discarded.  In this case, you need to explicitly invoke <a name="line.41"></a>
<FONT color="green">042</FONT>     * &lt;code&gt;LUDecompose()&lt;/code&gt; to recompute the decomposition<a name="line.42"></a>
<FONT color="green">043</FONT>     * before using any of the methods above.&lt;/li&gt;<a name="line.43"></a>
<FONT color="green">044</FONT>     * &lt;li&gt;<a name="line.44"></a>
<FONT color="green">045</FONT>     * As specified in the {@link RealMatrix} interface, matrix element indexing<a name="line.45"></a>
<FONT color="green">046</FONT>     * is 0-based -- e.g., &lt;code&gt;getEntry(0, 0)&lt;/code&gt;<a name="line.46"></a>
<FONT color="green">047</FONT>     * returns the element in the first row, first column of the matrix.&lt;/li&gt;&lt;/ul&gt;<a name="line.47"></a>
<FONT color="green">048</FONT>     * &lt;/p&gt;<a name="line.48"></a>
<FONT color="green">049</FONT>     *<a name="line.49"></a>
<FONT color="green">050</FONT>     * @version $Revision: 783702 $ $Date: 2009-06-11 04:54:02 -0400 (Thu, 11 Jun 2009) $<a name="line.50"></a>
<FONT color="green">051</FONT>     * @deprecated as of 2.0 replaced by {@link Array2DRowRealMatrix}<a name="line.51"></a>
<FONT color="green">052</FONT>     */<a name="line.52"></a>
<FONT color="green">053</FONT>    @Deprecated<a name="line.53"></a>
<FONT color="green">054</FONT>    public class RealMatrixImpl extends AbstractRealMatrix implements Serializable {<a name="line.54"></a>
<FONT color="green">055</FONT>        <a name="line.55"></a>
<FONT color="green">056</FONT>        /** Serializable version identifier */<a name="line.56"></a>
<FONT color="green">057</FONT>        private static final long serialVersionUID = -1067294169172445528L;<a name="line.57"></a>
<FONT color="green">058</FONT>    <a name="line.58"></a>
<FONT color="green">059</FONT>        /** Entries of the matrix */<a name="line.59"></a>
<FONT color="green">060</FONT>        protected double data[][];<a name="line.60"></a>
<FONT color="green">061</FONT>    <a name="line.61"></a>
<FONT color="green">062</FONT>        /**<a name="line.62"></a>
<FONT color="green">063</FONT>         * Creates a matrix with no data<a name="line.63"></a>
<FONT color="green">064</FONT>         */<a name="line.64"></a>
<FONT color="green">065</FONT>        public RealMatrixImpl() {<a name="line.65"></a>
<FONT color="green">066</FONT>        }<a name="line.66"></a>
<FONT color="green">067</FONT>    <a name="line.67"></a>
<FONT color="green">068</FONT>        /**<a name="line.68"></a>
<FONT color="green">069</FONT>         * Create a new RealMatrix with the supplied row and column dimensions.<a name="line.69"></a>
<FONT color="green">070</FONT>         *<a name="line.70"></a>
<FONT color="green">071</FONT>         * @param rowDimension  the number of rows in the new matrix<a name="line.71"></a>
<FONT color="green">072</FONT>         * @param columnDimension  the number of columns in the new matrix<a name="line.72"></a>
<FONT color="green">073</FONT>         * @throws IllegalArgumentException if row or column dimension is not<a name="line.73"></a>
<FONT color="green">074</FONT>         *  positive<a name="line.74"></a>
<FONT color="green">075</FONT>         */<a name="line.75"></a>
<FONT color="green">076</FONT>        public RealMatrixImpl(final int rowDimension, final int columnDimension)<a name="line.76"></a>
<FONT color="green">077</FONT>            throws IllegalArgumentException {<a name="line.77"></a>
<FONT color="green">078</FONT>            super(rowDimension, columnDimension);<a name="line.78"></a>
<FONT color="green">079</FONT>            data = new double[rowDimension][columnDimension];<a name="line.79"></a>
<FONT color="green">080</FONT>        }<a name="line.80"></a>
<FONT color="green">081</FONT>    <a name="line.81"></a>
<FONT color="green">082</FONT>        /**<a name="line.82"></a>
<FONT color="green">083</FONT>         * Create a new RealMatrix using the input array as the underlying<a name="line.83"></a>
<FONT color="green">084</FONT>         * data array.<a name="line.84"></a>
<FONT color="green">085</FONT>         * &lt;p&gt;The input array is copied, not referenced. This constructor has<a name="line.85"></a>
<FONT color="green">086</FONT>         * the same effect as calling {@link #RealMatrixImpl(double[][], boolean)}<a name="line.86"></a>
<FONT color="green">087</FONT>         * with the second argument set to &lt;code&gt;true&lt;/code&gt;.&lt;/p&gt;<a name="line.87"></a>
<FONT color="green">088</FONT>         *<a name="line.88"></a>
<FONT color="green">089</FONT>         * @param d data for new matrix<a name="line.89"></a>
<FONT color="green">090</FONT>         * @throws IllegalArgumentException if &lt;code&gt;d&lt;/code&gt; is not rectangular<a name="line.90"></a>
<FONT color="green">091</FONT>         *  (not all rows have the same length) or empty<a name="line.91"></a>
<FONT color="green">092</FONT>         * @throws NullPointerException if &lt;code&gt;d&lt;/code&gt; is null<a name="line.92"></a>
<FONT color="green">093</FONT>         * @see #RealMatrixImpl(double[][], boolean)<a name="line.93"></a>
<FONT color="green">094</FONT>         */<a name="line.94"></a>
<FONT color="green">095</FONT>        public RealMatrixImpl(final double[][] d)<a name="line.95"></a>
<FONT color="green">096</FONT>            throws IllegalArgumentException, NullPointerException {<a name="line.96"></a>
<FONT color="green">097</FONT>            copyIn(d);<a name="line.97"></a>
<FONT color="green">098</FONT>        }<a name="line.98"></a>
<FONT color="green">099</FONT>    <a name="line.99"></a>
<FONT color="green">100</FONT>        /**<a name="line.100"></a>
<FONT color="green">101</FONT>         * Create a new RealMatrix using the input array as the underlying<a name="line.101"></a>
<FONT color="green">102</FONT>         * data array.<a name="line.102"></a>
<FONT color="green">103</FONT>         * &lt;p&gt;If an array is built specially in order to be embedded in a<a name="line.103"></a>
<FONT color="green">104</FONT>         * RealMatrix and not used directly, the &lt;code&gt;copyArray&lt;/code&gt; may be<a name="line.104"></a>
<FONT color="green">105</FONT>         * set to &lt;code&gt;false&lt;/code. This will prevent the copying and improve<a name="line.105"></a>
<FONT color="green">106</FONT>         * performance as no new array will be built and no data will be copied.&lt;/p&gt;<a name="line.106"></a>
<FONT color="green">107</FONT>         * @param d data for new matrix<a name="line.107"></a>
<FONT color="green">108</FONT>         * @param copyArray if true, the input array will be copied, otherwise<a name="line.108"></a>
<FONT color="green">109</FONT>         * it will be referenced<a name="line.109"></a>
<FONT color="green">110</FONT>         * @throws IllegalArgumentException if &lt;code&gt;d&lt;/code&gt; is not rectangular<a name="line.110"></a>
<FONT color="green">111</FONT>         *  (not all rows have the same length) or empty<a name="line.111"></a>
<FONT color="green">112</FONT>         * @throws NullPointerException if &lt;code&gt;d&lt;/code&gt; is null<a name="line.112"></a>
<FONT color="green">113</FONT>         * @see #RealMatrixImpl(double[][])<a name="line.113"></a>
<FONT color="green">114</FONT>         */<a name="line.114"></a>
<FONT color="green">115</FONT>        public RealMatrixImpl(final double[][] d, final boolean copyArray)<a name="line.115"></a>
<FONT color="green">116</FONT>            throws IllegalArgumentException, NullPointerException {<a name="line.116"></a>
<FONT color="green">117</FONT>            if (copyArray) {<a name="line.117"></a>
<FONT color="green">118</FONT>                copyIn(d);<a name="line.118"></a>
<FONT color="green">119</FONT>            } else {<a name="line.119"></a>
<FONT color="green">120</FONT>                if (d == null) {<a name="line.120"></a>
<FONT color="green">121</FONT>                    throw new NullPointerException();<a name="line.121"></a>
<FONT color="green">122</FONT>                }   <a name="line.122"></a>
<FONT color="green">123</FONT>                final int nRows = d.length;<a name="line.123"></a>
<FONT color="green">124</FONT>                if (nRows == 0) {<a name="line.124"></a>
<FONT color="green">125</FONT>                    throw MathRuntimeException.createIllegalArgumentException("matrix must have at least one row"); <a name="line.125"></a>
<FONT color="green">126</FONT>                }<a name="line.126"></a>
<FONT color="green">127</FONT>                final int nCols = d[0].length;<a name="line.127"></a>
<FONT color="green">128</FONT>                if (nCols == 0) {<a name="line.128"></a>
<FONT color="green">129</FONT>                    throw MathRuntimeException.createIllegalArgumentException("matrix must have at least one column"); <a name="line.129"></a>
<FONT color="green">130</FONT>                }<a name="line.130"></a>
<FONT color="green">131</FONT>                for (int r = 1; r &lt; nRows; r++) {<a name="line.131"></a>
<FONT color="green">132</FONT>                    if (d[r].length != nCols) {<a name="line.132"></a>
<FONT color="green">133</FONT>                        throw MathRuntimeException.createIllegalArgumentException(<a name="line.133"></a>
<FONT color="green">134</FONT>                                "some rows have length {0} while others have length {1}",<a name="line.134"></a>
<FONT color="green">135</FONT>                                nCols, d[r].length);<a name="line.135"></a>
<FONT color="green">136</FONT>                    }<a name="line.136"></a>
<FONT color="green">137</FONT>                }       <a name="line.137"></a>
<FONT color="green">138</FONT>                data = d;<a name="line.138"></a>
<FONT color="green">139</FONT>            }<a name="line.139"></a>
<FONT color="green">140</FONT>        }<a name="line.140"></a>
<FONT color="green">141</FONT>    <a name="line.141"></a>
<FONT color="green">142</FONT>        /**<a name="line.142"></a>
<FONT color="green">143</FONT>         * Create a new (column) RealMatrix using &lt;code&gt;v&lt;/code&gt; as the<a name="line.143"></a>
<FONT color="green">144</FONT>         * data for the unique column of the &lt;code&gt;v.length x 1&lt;/code&gt; matrix<a name="line.144"></a>
<FONT color="green">145</FONT>         * created.<a name="line.145"></a>
<FONT color="green">146</FONT>         * &lt;p&gt;The input array is copied, not referenced.&lt;/p&gt;<a name="line.146"></a>
<FONT color="green">147</FONT>         *<a name="line.147"></a>
<FONT color="green">148</FONT>         * @param v column vector holding data for new matrix<a name="line.148"></a>
<FONT color="green">149</FONT>         */<a name="line.149"></a>
<FONT color="green">150</FONT>        public RealMatrixImpl(final double[] v) {<a name="line.150"></a>
<FONT color="green">151</FONT>            final int nRows = v.length;<a name="line.151"></a>
<FONT color="green">152</FONT>            data = new double[nRows][1];<a name="line.152"></a>
<FONT color="green">153</FONT>            for (int row = 0; row &lt; nRows; row++) {<a name="line.153"></a>
<FONT color="green">154</FONT>                data[row][0] = v[row];<a name="line.154"></a>
<FONT color="green">155</FONT>            }<a name="line.155"></a>
<FONT color="green">156</FONT>        }<a name="line.156"></a>
<FONT color="green">157</FONT>    <a name="line.157"></a>
<FONT color="green">158</FONT>        /** {@inheritDoc} */<a name="line.158"></a>
<FONT color="green">159</FONT>        @Override<a name="line.159"></a>
<FONT color="green">160</FONT>        public RealMatrix createMatrix(final int rowDimension, final int columnDimension)<a name="line.160"></a>
<FONT color="green">161</FONT>            throws IllegalArgumentException {<a name="line.161"></a>
<FONT color="green">162</FONT>            return new RealMatrixImpl(rowDimension, columnDimension);<a name="line.162"></a>
<FONT color="green">163</FONT>        }<a name="line.163"></a>
<FONT color="green">164</FONT>    <a name="line.164"></a>
<FONT color="green">165</FONT>        /** {@inheritDoc} */<a name="line.165"></a>
<FONT color="green">166</FONT>        @Override<a name="line.166"></a>
<FONT color="green">167</FONT>        public RealMatrix copy() {<a name="line.167"></a>
<FONT color="green">168</FONT>            return new RealMatrixImpl(copyOut(), false);<a name="line.168"></a>
<FONT color="green">169</FONT>        }<a name="line.169"></a>
<FONT color="green">170</FONT>    <a name="line.170"></a>
<FONT color="green">171</FONT>        /** {@inheritDoc} */<a name="line.171"></a>
<FONT color="green">172</FONT>        @Override<a name="line.172"></a>
<FONT color="green">173</FONT>        public RealMatrix add(final RealMatrix m)<a name="line.173"></a>
<FONT color="green">174</FONT>            throws IllegalArgumentException {<a name="line.174"></a>
<FONT color="green">175</FONT>            try {<a name="line.175"></a>
<FONT color="green">176</FONT>                return add((RealMatrixImpl) m);<a name="line.176"></a>
<FONT color="green">177</FONT>            } catch (ClassCastException cce) {<a name="line.177"></a>
<FONT color="green">178</FONT>                return super.add(m);<a name="line.178"></a>
<FONT color="green">179</FONT>            }<a name="line.179"></a>
<FONT color="green">180</FONT>        }<a name="line.180"></a>
<FONT color="green">181</FONT>    <a name="line.181"></a>
<FONT color="green">182</FONT>        /**<a name="line.182"></a>
<FONT color="green">183</FONT>         * Compute the sum of this and &lt;code&gt;m&lt;/code&gt;.<a name="line.183"></a>
<FONT color="green">184</FONT>         *<a name="line.184"></a>
<FONT color="green">185</FONT>         * @param m    matrix to be added<a name="line.185"></a>
<FONT color="green">186</FONT>         * @return     this + m<a name="line.186"></a>
<FONT color="green">187</FONT>         * @throws  IllegalArgumentException if m is not the same size as this<a name="line.187"></a>
<FONT color="green">188</FONT>         */<a name="line.188"></a>
<FONT color="green">189</FONT>        public RealMatrixImpl add(final RealMatrixImpl m)<a name="line.189"></a>
<FONT color="green">190</FONT>            throws IllegalArgumentException {<a name="line.190"></a>
<FONT color="green">191</FONT>    <a name="line.191"></a>
<FONT color="green">192</FONT>            // safety check<a name="line.192"></a>
<FONT color="green">193</FONT>            MatrixUtils.checkAdditionCompatible(this, m);<a name="line.193"></a>
<FONT color="green">194</FONT>    <a name="line.194"></a>
<FONT color="green">195</FONT>            final int rowCount    = getRowDimension();<a name="line.195"></a>
<FONT color="green">196</FONT>            final int columnCount = getColumnDimension();<a name="line.196"></a>
<FONT color="green">197</FONT>            final double[][] outData = new double[rowCount][columnCount];<a name="line.197"></a>
<FONT color="green">198</FONT>            for (int row = 0; row &lt; rowCount; row++) {<a name="line.198"></a>
<FONT color="green">199</FONT>                final double[] dataRow    = data[row];<a name="line.199"></a>
<FONT color="green">200</FONT>                final double[] mRow       = m.data[row];<a name="line.200"></a>
<FONT color="green">201</FONT>                final double[] outDataRow = outData[row];<a name="line.201"></a>
<FONT color="green">202</FONT>                for (int col = 0; col &lt; columnCount; col++) {<a name="line.202"></a>
<FONT color="green">203</FONT>                    outDataRow[col] = dataRow[col] + mRow[col];<a name="line.203"></a>
<FONT color="green">204</FONT>                }<a name="line.204"></a>
<FONT color="green">205</FONT>            }<a name="line.205"></a>
<FONT color="green">206</FONT>    <a name="line.206"></a>
<FONT color="green">207</FONT>            return new RealMatrixImpl(outData, false);<a name="line.207"></a>
<FONT color="green">208</FONT>    <a name="line.208"></a>
<FONT color="green">209</FONT>        }<a name="line.209"></a>
<FONT color="green">210</FONT>    <a name="line.210"></a>
<FONT color="green">211</FONT>        /** {@inheritDoc} */<a name="line.211"></a>
<FONT color="green">212</FONT>        @Override<a name="line.212"></a>
<FONT color="green">213</FONT>        public RealMatrix subtract(final RealMatrix m)<a name="line.213"></a>
<FONT color="green">214</FONT>            throws IllegalArgumentException {<a name="line.214"></a>
<FONT color="green">215</FONT>            try {<a name="line.215"></a>
<FONT color="green">216</FONT>                return subtract((RealMatrixImpl) m);<a name="line.216"></a>
<FONT color="green">217</FONT>            } catch (ClassCastException cce) {<a name="line.217"></a>
<FONT color="green">218</FONT>                return super.subtract(m);<a name="line.218"></a>
<FONT color="green">219</FONT>            }<a name="line.219"></a>
<FONT color="green">220</FONT>        }<a name="line.220"></a>
<FONT color="green">221</FONT>    <a name="line.221"></a>
<FONT color="green">222</FONT>        /**<a name="line.222"></a>
<FONT color="green">223</FONT>         * Compute  this minus &lt;code&gt;m&lt;/code&gt;.<a name="line.223"></a>
<FONT color="green">224</FONT>         *<a name="line.224"></a>
<FONT color="green">225</FONT>         * @param m    matrix to be subtracted<a name="line.225"></a>
<FONT color="green">226</FONT>         * @return     this + m<a name="line.226"></a>
<FONT color="green">227</FONT>         * @throws  IllegalArgumentException if m is not the same size as this<a name="line.227"></a>
<FONT color="green">228</FONT>         */<a name="line.228"></a>
<FONT color="green">229</FONT>        public RealMatrixImpl subtract(final RealMatrixImpl m)<a name="line.229"></a>
<FONT color="green">230</FONT>            throws IllegalArgumentException {<a name="line.230"></a>
<FONT color="green">231</FONT>    <a name="line.231"></a>
<FONT color="green">232</FONT>            // safety check<a name="line.232"></a>
<FONT color="green">233</FONT>            MatrixUtils.checkSubtractionCompatible(this, m);<a name="line.233"></a>
<FONT color="green">234</FONT>    <a name="line.234"></a>
<FONT color="green">235</FONT>            final int rowCount    = getRowDimension();<a name="line.235"></a>
<FONT color="green">236</FONT>            final int columnCount = getColumnDimension();<a name="line.236"></a>
<FONT color="green">237</FONT>            final double[][] outData = new double[rowCount][columnCount];<a name="line.237"></a>
<FONT color="green">238</FONT>            for (int row = 0; row &lt; rowCount; row++) {<a name="line.238"></a>
<FONT color="green">239</FONT>                final double[] dataRow    = data[row];<a name="line.239"></a>
<FONT color="green">240</FONT>                final double[] mRow       = m.data[row];<a name="line.240"></a>
<FONT color="green">241</FONT>                final double[] outDataRow = outData[row];<a name="line.241"></a>
<FONT color="green">242</FONT>                for (int col = 0; col &lt; columnCount; col++) {<a name="line.242"></a>
<FONT color="green">243</FONT>                    outDataRow[col] = dataRow[col] - mRow[col];<a name="line.243"></a>
<FONT color="green">244</FONT>                }<a name="line.244"></a>
<FONT color="green">245</FONT>            }<a name="line.245"></a>
<FONT color="green">246</FONT>    <a name="line.246"></a>
<FONT color="green">247</FONT>            return new RealMatrixImpl(outData, false);<a name="line.247"></a>
<FONT color="green">248</FONT>    <a name="line.248"></a>
<FONT color="green">249</FONT>        }<a name="line.249"></a>
<FONT color="green">250</FONT>    <a name="line.250"></a>
<FONT color="green">251</FONT>        /** {@inheritDoc} */<a name="line.251"></a>
<FONT color="green">252</FONT>        @Override<a name="line.252"></a>
<FONT color="green">253</FONT>        public RealMatrix multiply(final RealMatrix m)<a name="line.253"></a>
<FONT color="green">254</FONT>            throws IllegalArgumentException {<a name="line.254"></a>
<FONT color="green">255</FONT>            try {<a name="line.255"></a>
<FONT color="green">256</FONT>                return multiply((RealMatrixImpl) m);<a name="line.256"></a>
<FONT color="green">257</FONT>            } catch (ClassCastException cce) {<a name="line.257"></a>
<FONT color="green">258</FONT>                return super.multiply(m);<a name="line.258"></a>
<FONT color="green">259</FONT>            }<a name="line.259"></a>
<FONT color="green">260</FONT>        }<a name="line.260"></a>
<FONT color="green">261</FONT>    <a name="line.261"></a>
<FONT color="green">262</FONT>        /**<a name="line.262"></a>
<FONT color="green">263</FONT>         * Returns the result of postmultiplying this by &lt;code&gt;m&lt;/code&gt;.<a name="line.263"></a>
<FONT color="green">264</FONT>         * @param m    matrix to postmultiply by<a name="line.264"></a>
<FONT color="green">265</FONT>         * @return     this*m<a name="line.265"></a>
<FONT color="green">266</FONT>         * @throws     IllegalArgumentException<a name="line.266"></a>
<FONT color="green">267</FONT>         *             if columnDimension(this) != rowDimension(m)<a name="line.267"></a>
<FONT color="green">268</FONT>         */<a name="line.268"></a>
<FONT color="green">269</FONT>        public RealMatrixImpl multiply(final RealMatrixImpl m)<a name="line.269"></a>
<FONT color="green">270</FONT>            throws IllegalArgumentException {<a name="line.270"></a>
<FONT color="green">271</FONT>    <a name="line.271"></a>
<FONT color="green">272</FONT>            // safety check<a name="line.272"></a>
<FONT color="green">273</FONT>            MatrixUtils.checkMultiplicationCompatible(this, m);<a name="line.273"></a>
<FONT color="green">274</FONT>    <a name="line.274"></a>
<FONT color="green">275</FONT>            final int nRows = this.getRowDimension();<a name="line.275"></a>
<FONT color="green">276</FONT>            final int nCols = m.getColumnDimension();<a name="line.276"></a>
<FONT color="green">277</FONT>            final int nSum = this.getColumnDimension();<a name="line.277"></a>
<FONT color="green">278</FONT>            final double[][] outData = new double[nRows][nCols];<a name="line.278"></a>
<FONT color="green">279</FONT>            for (int row = 0; row &lt; nRows; row++) {<a name="line.279"></a>
<FONT color="green">280</FONT>                final double[] dataRow    = data[row];<a name="line.280"></a>
<FONT color="green">281</FONT>                final double[] outDataRow = outData[row];<a name="line.281"></a>
<FONT color="green">282</FONT>                for (int col = 0; col &lt; nCols; col++) {<a name="line.282"></a>
<FONT color="green">283</FONT>                    double sum = 0;<a name="line.283"></a>
<FONT color="green">284</FONT>                    for (int i = 0; i &lt; nSum; i++) {<a name="line.284"></a>
<FONT color="green">285</FONT>                        sum += dataRow[i] * m.data[i][col];<a name="line.285"></a>
<FONT color="green">286</FONT>                    }<a name="line.286"></a>
<FONT color="green">287</FONT>                    outDataRow[col] = sum;<a name="line.287"></a>
<FONT color="green">288</FONT>                }<a name="line.288"></a>
<FONT color="green">289</FONT>            }<a name="line.289"></a>
<FONT color="green">290</FONT>    <a name="line.290"></a>
<FONT color="green">291</FONT>            return new RealMatrixImpl(outData, false);<a name="line.291"></a>
<FONT color="green">292</FONT>    <a name="line.292"></a>
<FONT color="green">293</FONT>        }<a name="line.293"></a>
<FONT color="green">294</FONT>    <a name="line.294"></a>
<FONT color="green">295</FONT>        /** {@inheritDoc} */<a name="line.295"></a>
<FONT color="green">296</FONT>        @Override<a name="line.296"></a>
<FONT color="green">297</FONT>        public double[][] getData() {<a name="line.297"></a>
<FONT color="green">298</FONT>            return copyOut();<a name="line.298"></a>
<FONT color="green">299</FONT>        }<a name="line.299"></a>
<FONT color="green">300</FONT>    <a name="line.300"></a>
<FONT color="green">301</FONT>        /**<a name="line.301"></a>
<FONT color="green">302</FONT>         * Returns a reference to the underlying data array.<a name="line.302"></a>
<FONT color="green">303</FONT>         * &lt;p&gt;<a name="line.303"></a>
<FONT color="green">304</FONT>         * Does &lt;strong&gt;not&lt;/strong&gt; make a fresh copy of the underlying data.&lt;/p&gt;<a name="line.304"></a>
<FONT color="green">305</FONT>         *<a name="line.305"></a>
<FONT color="green">306</FONT>         * @return 2-dimensional array of entries<a name="line.306"></a>
<FONT color="green">307</FONT>         */<a name="line.307"></a>
<FONT color="green">308</FONT>        public double[][] getDataRef() {<a name="line.308"></a>
<FONT color="green">309</FONT>            return data;<a name="line.309"></a>
<FONT color="green">310</FONT>        }<a name="line.310"></a>
<FONT color="green">311</FONT>    <a name="line.311"></a>
<FONT color="green">312</FONT>        /** {@inheritDoc} */<a name="line.312"></a>
<FONT color="green">313</FONT>        @Override<a name="line.313"></a>
<FONT color="green">314</FONT>        public void setSubMatrix(final double[][] subMatrix, final int row, final int column) <a name="line.314"></a>
<FONT color="green">315</FONT>        throws MatrixIndexException {<a name="line.315"></a>
<FONT color="green">316</FONT>            if (data == null) {<a name="line.316"></a>
<FONT color="green">317</FONT>                if (row &gt; 0) {<a name="line.317"></a>
<FONT color="green">318</FONT>                    throw MathRuntimeException.createIllegalStateException(<a name="line.318"></a>
<FONT color="green">319</FONT>                            "first {0} rows are not initialized yet",<a name="line.319"></a>
<FONT color="green">320</FONT>                            row);<a name="line.320"></a>
<FONT color="green">321</FONT>                }<a name="line.321"></a>
<FONT color="green">322</FONT>                if (column &gt; 0) {<a name="line.322"></a>
<FONT color="green">323</FONT>                    throw MathRuntimeException.createIllegalStateException(<a name="line.323"></a>
<FONT color="green">324</FONT>                            "first {0} columns are not initialized yet",<a name="line.324"></a>
<FONT color="green">325</FONT>                            column);<a name="line.325"></a>
<FONT color="green">326</FONT>                }<a name="line.326"></a>
<FONT color="green">327</FONT>                final int nRows = subMatrix.length;<a name="line.327"></a>
<FONT color="green">328</FONT>                if (nRows == 0) {<a name="line.328"></a>
<FONT color="green">329</FONT>                    throw MathRuntimeException.createIllegalArgumentException("matrix must have at least one row"); <a name="line.329"></a>
<FONT color="green">330</FONT>                }<a name="line.330"></a>
<FONT color="green">331</FONT>    <a name="line.331"></a>
<FONT color="green">332</FONT>                final int nCols = subMatrix[0].length;<a name="line.332"></a>
<FONT color="green">333</FONT>                if (nCols == 0) {<a name="line.333"></a>
<FONT color="green">334</FONT>                    throw MathRuntimeException.createIllegalArgumentException("matrix must have at least one column"); <a name="line.334"></a>
<FONT color="green">335</FONT>                }<a name="line.335"></a>
<FONT color="green">336</FONT>                data = new double[subMatrix.length][nCols];<a name="line.336"></a>
<FONT color="green">337</FONT>                for (int i = 0; i &lt; data.length; ++i) {<a name="line.337"></a>
<FONT color="green">338</FONT>                    if (subMatrix[i].length != nCols) {<a name="line.338"></a>
<FONT color="green">339</FONT>                        throw MathRuntimeException.createIllegalArgumentException(<a name="line.339"></a>
<FONT color="green">340</FONT>                                "some rows have length {0} while others have length {1}",<a name="line.340"></a>
<FONT color="green">341</FONT>                                nCols, subMatrix[i].length); <a name="line.341"></a>
<FONT color="green">342</FONT>                    }<a name="line.342"></a>
<FONT color="green">343</FONT>                    System.arraycopy(subMatrix[i], 0, data[i + row], column, nCols);<a name="line.343"></a>
<FONT color="green">344</FONT>                }<a name="line.344"></a>
<FONT color="green">345</FONT>            } else {<a name="line.345"></a>
<FONT color="green">346</FONT>                super.setSubMatrix(subMatrix, row, column);<a name="line.346"></a>
<FONT color="green">347</FONT>            }<a name="line.347"></a>
<FONT color="green">348</FONT>    <a name="line.348"></a>
<FONT color="green">349</FONT>        }<a name="line.349"></a>
<FONT color="green">350</FONT>    <a name="line.350"></a>
<FONT color="green">351</FONT>        /** {@inheritDoc} */<a name="line.351"></a>
<FONT color="green">352</FONT>        @Override<a name="line.352"></a>
<FONT color="green">353</FONT>        public double getEntry(final int row, final int column)<a name="line.353"></a>
<FONT color="green">354</FONT>            throws MatrixIndexException {<a name="line.354"></a>
<FONT color="green">355</FONT>            try {<a name="line.355"></a>
<FONT color="green">356</FONT>                return data[row][column];<a name="line.356"></a>
<FONT color="green">357</FONT>            } catch (ArrayIndexOutOfBoundsException e) {<a name="line.357"></a>
<FONT color="green">358</FONT>                throw new MatrixIndexException(<a name="line.358"></a>
<FONT color="green">359</FONT>                        "no entry at indices ({0}, {1}) in a {2}x{3} matrix",<a name="line.359"></a>
<FONT color="green">360</FONT>                        row, column, getRowDimension(), getColumnDimension());<a name="line.360"></a>
<FONT color="green">361</FONT>            }<a name="line.361"></a>
<FONT color="green">362</FONT>        }<a name="line.362"></a>
<FONT color="green">363</FONT>    <a name="line.363"></a>
<FONT color="green">364</FONT>        /** {@inheritDoc} */<a name="line.364"></a>
<FONT color="green">365</FONT>        @Override<a name="line.365"></a>
<FONT color="green">366</FONT>        public void setEntry(final int row, final int column, final double value)<a name="line.366"></a>
<FONT color="green">367</FONT>            throws MatrixIndexException {<a name="line.367"></a>
<FONT color="green">368</FONT>            try {<a name="line.368"></a>
<FONT color="green">369</FONT>                data[row][column] = value;<a name="line.369"></a>
<FONT color="green">370</FONT>            } catch (ArrayIndexOutOfBoundsException e) {<a name="line.370"></a>
<FONT color="green">371</FONT>                throw new MatrixIndexException(<a name="line.371"></a>
<FONT color="green">372</FONT>                        "no entry at indices ({0}, {1}) in a {2}x{3} matrix",<a name="line.372"></a>
<FONT color="green">373</FONT>                        row, column, getRowDimension(), getColumnDimension());<a name="line.373"></a>
<FONT color="green">374</FONT>            }<a name="line.374"></a>
<FONT color="green">375</FONT>        }<a name="line.375"></a>
<FONT color="green">376</FONT>    <a name="line.376"></a>
<FONT color="green">377</FONT>        /** {@inheritDoc} */<a name="line.377"></a>
<FONT color="green">378</FONT>        @Override<a name="line.378"></a>
<FONT color="green">379</FONT>        public void addToEntry(final int row, final int column, final double increment)<a name="line.379"></a>
<FONT color="green">380</FONT>            throws MatrixIndexException {<a name="line.380"></a>
<FONT color="green">381</FONT>            try {<a name="line.381"></a>
<FONT color="green">382</FONT>                data[row][column] += increment;<a name="line.382"></a>
<FONT color="green">383</FONT>            } catch (ArrayIndexOutOfBoundsException e) {<a name="line.383"></a>
<FONT color="green">384</FONT>                throw new MatrixIndexException(<a name="line.384"></a>
<FONT color="green">385</FONT>                        "no entry at indices ({0}, {1}) in a {2}x{3} matrix",<a name="line.385"></a>
<FONT color="green">386</FONT>                        row, column, getRowDimension(), getColumnDimension());<a name="line.386"></a>
<FONT color="green">387</FONT>            }      <a name="line.387"></a>
<FONT color="green">388</FONT>        }<a name="line.388"></a>
<FONT color="green">389</FONT>    <a name="line.389"></a>
<FONT color="green">390</FONT>        /** {@inheritDoc} */<a name="line.390"></a>
<FONT color="green">391</FONT>        @Override<a name="line.391"></a>
<FONT color="green">392</FONT>        public void multiplyEntry(final int row, final int column, final double factor)<a name="line.392"></a>
<FONT color="green">393</FONT>            throws MatrixIndexException {<a name="line.393"></a>
<FONT color="green">394</FONT>            try {<a name="line.394"></a>
<FONT color="green">395</FONT>                data[row][column] *= factor;<a name="line.395"></a>
<FONT color="green">396</FONT>            } catch (ArrayIndexOutOfBoundsException e) {<a name="line.396"></a>
<FONT color="green">397</FONT>                throw new MatrixIndexException(<a name="line.397"></a>
<FONT color="green">398</FONT>                        "no entry at indices ({0}, {1}) in a {2}x{3} matrix",<a name="line.398"></a>
<FONT color="green">399</FONT>                        row, column, getRowDimension(), getColumnDimension());<a name="line.399"></a>
<FONT color="green">400</FONT>            }      <a name="line.400"></a>
<FONT color="green">401</FONT>        }<a name="line.401"></a>
<FONT color="green">402</FONT>    <a name="line.402"></a>
<FONT color="green">403</FONT>        /** {@inheritDoc} */<a name="line.403"></a>
<FONT color="green">404</FONT>        @Override<a name="line.404"></a>
<FONT color="green">405</FONT>        public int getRowDimension() {<a name="line.405"></a>
<FONT color="green">406</FONT>            return (data == null) ? 0 : data.length;<a name="line.406"></a>
<FONT color="green">407</FONT>        }<a name="line.407"></a>
<FONT color="green">408</FONT>    <a name="line.408"></a>
<FONT color="green">409</FONT>        /** {@inheritDoc} */<a name="line.409"></a>
<FONT color="green">410</FONT>        @Override<a name="line.410"></a>
<FONT color="green">411</FONT>        public int getColumnDimension() {<a name="line.411"></a>
<FONT color="green">412</FONT>            return ((data == null) || (data[0] == null)) ? 0 : data[0].length;<a name="line.412"></a>
<FONT color="green">413</FONT>        }<a name="line.413"></a>
<FONT color="green">414</FONT>    <a name="line.414"></a>
<FONT color="green">415</FONT>        /** {@inheritDoc} */<a name="line.415"></a>
<FONT color="green">416</FONT>        @Override<a name="line.416"></a>
<FONT color="green">417</FONT>        public double[] operate(final double[] v)<a name="line.417"></a>
<FONT color="green">418</FONT>            throws IllegalArgumentException {<a name="line.418"></a>
<FONT color="green">419</FONT>            final int nRows = this.getRowDimension();<a name="line.419"></a>
<FONT color="green">420</FONT>            final int nCols = this.getColumnDimension();<a name="line.420"></a>
<FONT color="green">421</FONT>            if (v.length != nCols) {<a name="line.421"></a>
<FONT color="green">422</FONT>                throw MathRuntimeException.createIllegalArgumentException(<a name="line.422"></a>
<FONT color="green">423</FONT>                        "vector length mismatch: got {0} but expected {1}",<a name="line.423"></a>
<FONT color="green">424</FONT>                        v.length, nCols);<a name="line.424"></a>
<FONT color="green">425</FONT>            }<a name="line.425"></a>
<FONT color="green">426</FONT>            final double[] out = new double[nRows];<a name="line.426"></a>
<FONT color="green">427</FONT>            for (int row = 0; row &lt; nRows; row++) {<a name="line.427"></a>
<FONT color="green">428</FONT>                final double[] dataRow = data[row];<a name="line.428"></a>
<FONT color="green">429</FONT>                double sum = 0;<a name="line.429"></a>
<FONT color="green">430</FONT>                for (int i = 0; i &lt; nCols; i++) {<a name="line.430"></a>
<FONT color="green">431</FONT>                    sum += dataRow[i] * v[i];<a name="line.431"></a>
<FONT color="green">432</FONT>                }<a name="line.432"></a>
<FONT color="green">433</FONT>                out[row] = sum;<a name="line.433"></a>
<FONT color="green">434</FONT>            }<a name="line.434"></a>
<FONT color="green">435</FONT>            return out;<a name="line.435"></a>
<FONT color="green">436</FONT>        }<a name="line.436"></a>
<FONT color="green">437</FONT>    <a name="line.437"></a>
<FONT color="green">438</FONT>        /** {@inheritDoc} */<a name="line.438"></a>
<FONT color="green">439</FONT>        @Override<a name="line.439"></a>
<FONT color="green">440</FONT>        public double[] preMultiply(final double[] v)<a name="line.440"></a>
<FONT color="green">441</FONT>            throws IllegalArgumentException {<a name="line.441"></a>
<FONT color="green">442</FONT>    <a name="line.442"></a>
<FONT color="green">443</FONT>            final int nRows = getRowDimension();<a name="line.443"></a>
<FONT color="green">444</FONT>            final int nCols = getColumnDimension();<a name="line.444"></a>
<FONT color="green">445</FONT>            if (v.length != nRows) {<a name="line.445"></a>
<FONT color="green">446</FONT>                throw MathRuntimeException.createIllegalArgumentException(<a name="line.446"></a>
<FONT color="green">447</FONT>                        "vector length mismatch: got {0} but expected {1}",<a name="line.447"></a>
<FONT color="green">448</FONT>                        v.length, nRows);<a name="line.448"></a>
<FONT color="green">449</FONT>            }<a name="line.449"></a>
<FONT color="green">450</FONT>    <a name="line.450"></a>
<FONT color="green">451</FONT>            final double[] out = new double[nCols];<a name="line.451"></a>
<FONT color="green">452</FONT>            for (int col = 0; col &lt; nCols; ++col) {<a name="line.452"></a>
<FONT color="green">453</FONT>                double sum = 0;<a name="line.453"></a>
<FONT color="green">454</FONT>                for (int i = 0; i &lt; nRows; ++i) {<a name="line.454"></a>
<FONT color="green">455</FONT>                    sum += data[i][col] * v[i];<a name="line.455"></a>
<FONT color="green">456</FONT>                }<a name="line.456"></a>
<FONT color="green">457</FONT>                out[col] = sum;<a name="line.457"></a>
<FONT color="green">458</FONT>            }<a name="line.458"></a>
<FONT color="green">459</FONT>    <a name="line.459"></a>
<FONT color="green">460</FONT>            return out;<a name="line.460"></a>
<FONT color="green">461</FONT>    <a name="line.461"></a>
<FONT color="green">462</FONT>        }<a name="line.462"></a>
<FONT color="green">463</FONT>    <a name="line.463"></a>
<FONT color="green">464</FONT>        /** {@inheritDoc} */<a name="line.464"></a>
<FONT color="green">465</FONT>        @Override<a name="line.465"></a>
<FONT color="green">466</FONT>        public double walkInRowOrder(final RealMatrixChangingVisitor visitor)<a name="line.466"></a>
<FONT color="green">467</FONT>            throws MatrixVisitorException {<a name="line.467"></a>
<FONT color="green">468</FONT>            final int rows    = getRowDimension();<a name="line.468"></a>
<FONT color="green">469</FONT>            final int columns = getColumnDimension();<a name="line.469"></a>
<FONT color="green">470</FONT>            visitor.start(rows, columns, 0, rows - 1, 0, columns - 1);<a name="line.470"></a>
<FONT color="green">471</FONT>            for (int i = 0; i &lt; rows; ++i) {<a name="line.471"></a>
<FONT color="green">472</FONT>                final double[] rowI = data[i];<a name="line.472"></a>
<FONT color="green">473</FONT>                for (int j = 0; j &lt; columns; ++j) {<a name="line.473"></a>
<FONT color="green">474</FONT>                    rowI[j] = visitor.visit(i, j, rowI[j]);<a name="line.474"></a>
<FONT color="green">475</FONT>                }<a name="line.475"></a>
<FONT color="green">476</FONT>            }<a name="line.476"></a>
<FONT color="green">477</FONT>            return visitor.end();<a name="line.477"></a>
<FONT color="green">478</FONT>        }<a name="line.478"></a>
<FONT color="green">479</FONT>    <a name="line.479"></a>
<FONT color="green">480</FONT>        /** {@inheritDoc} */<a name="line.480"></a>
<FONT color="green">481</FONT>        @Override<a name="line.481"></a>
<FONT color="green">482</FONT>        public double walkInRowOrder(final RealMatrixPreservingVisitor visitor)<a name="line.482"></a>
<FONT color="green">483</FONT>            throws MatrixVisitorException {<a name="line.483"></a>
<FONT color="green">484</FONT>            final int rows    = getRowDimension();<a name="line.484"></a>
<FONT color="green">485</FONT>            final int columns = getColumnDimension();<a name="line.485"></a>
<FONT color="green">486</FONT>            visitor.start(rows, columns, 0, rows - 1, 0, columns - 1);<a name="line.486"></a>
<FONT color="green">487</FONT>            for (int i = 0; i &lt; rows; ++i) {<a name="line.487"></a>
<FONT color="green">488</FONT>                final double[] rowI = data[i];<a name="line.488"></a>
<FONT color="green">489</FONT>                for (int j = 0; j &lt; columns; ++j) {<a name="line.489"></a>
<FONT color="green">490</FONT>                    visitor.visit(i, j, rowI[j]);<a name="line.490"></a>
<FONT color="green">491</FONT>                }<a name="line.491"></a>
<FONT color="green">492</FONT>            }<a name="line.492"></a>
<FONT color="green">493</FONT>            return visitor.end();<a name="line.493"></a>
<FONT color="green">494</FONT>        }<a name="line.494"></a>
<FONT color="green">495</FONT>    <a name="line.495"></a>
<FONT color="green">496</FONT>        /** {@inheritDoc} */<a name="line.496"></a>
<FONT color="green">497</FONT>        @Override<a name="line.497"></a>
<FONT color="green">498</FONT>        public double walkInRowOrder(final RealMatrixChangingVisitor visitor,<a name="line.498"></a>
<FONT color="green">499</FONT>                                     final int startRow, final int endRow,<a name="line.499"></a>
<FONT color="green">500</FONT>                                     final int startColumn, final int endColumn)<a name="line.500"></a>
<FONT color="green">501</FONT>            throws MatrixIndexException, MatrixVisitorException {<a name="line.501"></a>
<FONT color="green">502</FONT>            MatrixUtils.checkSubMatrixIndex(this, startRow, endRow, startColumn, endColumn);<a name="line.502"></a>
<FONT color="green">503</FONT>            visitor.start(getRowDimension(), getColumnDimension(),<a name="line.503"></a>
<FONT color="green">504</FONT>                          startRow, endRow, startColumn, endColumn);<a name="line.504"></a>
<FONT color="green">505</FONT>            for (int i = startRow; i &lt;= endRow; ++i) {<a name="line.505"></a>
<FONT color="green">506</FONT>                final double[] rowI = data[i];<a name="line.506"></a>
<FONT color="green">507</FONT>                for (int j = startColumn; j &lt;= endColumn; ++j) {<a name="line.507"></a>
<FONT color="green">508</FONT>                    rowI[j] = visitor.visit(i, j, rowI[j]);<a name="line.508"></a>
<FONT color="green">509</FONT>                }<a name="line.509"></a>
<FONT color="green">510</FONT>            }<a name="line.510"></a>
<FONT color="green">511</FONT>            return visitor.end();<a name="line.511"></a>
<FONT color="green">512</FONT>        }<a name="line.512"></a>
<FONT color="green">513</FONT>    <a name="line.513"></a>
<FONT color="green">514</FONT>        /** {@inheritDoc} */<a name="line.514"></a>
<FONT color="green">515</FONT>        @Override<a name="line.515"></a>
<FONT color="green">516</FONT>        public double walkInRowOrder(final RealMatrixPreservingVisitor visitor,<a name="line.516"></a>
<FONT color="green">517</FONT>                                     final int startRow, final int endRow,<a name="line.517"></a>
<FONT color="green">518</FONT>                                     final int startColumn, final int endColumn)<a name="line.518"></a>
<FONT color="green">519</FONT>            throws MatrixIndexException, MatrixVisitorException {<a name="line.519"></a>
<FONT color="green">520</FONT>            MatrixUtils.checkSubMatrixIndex(this, startRow, endRow, startColumn, endColumn);<a name="line.520"></a>
<FONT color="green">521</FONT>            visitor.start(getRowDimension(), getColumnDimension(),<a name="line.521"></a>
<FONT color="green">522</FONT>                          startRow, endRow, startColumn, endColumn);<a name="line.522"></a>
<FONT color="green">523</FONT>            for (int i = startRow; i &lt;= endRow; ++i) {<a name="line.523"></a>
<FONT color="green">524</FONT>                final double[] rowI = data[i];<a name="line.524"></a>
<FONT color="green">525</FONT>                for (int j = startColumn; j &lt;= endColumn; ++j) {<a name="line.525"></a>
<FONT color="green">526</FONT>                    visitor.visit(i, j, rowI[j]);<a name="line.526"></a>
<FONT color="green">527</FONT>                }<a name="line.527"></a>
<FONT color="green">528</FONT>            }<a name="line.528"></a>
<FONT color="green">529</FONT>            return visitor.end();<a name="line.529"></a>
<FONT color="green">530</FONT>        }<a name="line.530"></a>
<FONT color="green">531</FONT>    <a name="line.531"></a>
<FONT color="green">532</FONT>        /** {@inheritDoc} */<a name="line.532"></a>
<FONT color="green">533</FONT>        @Override<a name="line.533"></a>
<FONT color="green">534</FONT>        public double walkInColumnOrder(final RealMatrixChangingVisitor visitor)<a name="line.534"></a>
<FONT color="green">535</FONT>            throws MatrixVisitorException {<a name="line.535"></a>
<FONT color="green">536</FONT>            final int rows    = getRowDimension();<a name="line.536"></a>
<FONT color="green">537</FONT>            final int columns = getColumnDimension();<a name="line.537"></a>
<FONT color="green">538</FONT>            visitor.start(rows, columns, 0, rows - 1, 0, columns - 1);<a name="line.538"></a>
<FONT color="green">539</FONT>            for (int j = 0; j &lt; columns; ++j) {<a name="line.539"></a>
<FONT color="green">540</FONT>                for (int i = 0; i &lt; rows; ++i) {<a name="line.540"></a>
<FONT color="green">541</FONT>                    final double[] rowI = data[i];<a name="line.541"></a>
<FONT color="green">542</FONT>                    rowI[j] = visitor.visit(i, j, rowI[j]);<a name="line.542"></a>
<FONT color="green">543</FONT>                }<a name="line.543"></a>
<FONT color="green">544</FONT>            }<a name="line.544"></a>
<FONT color="green">545</FONT>            return visitor.end();<a name="line.545"></a>
<FONT color="green">546</FONT>        }<a name="line.546"></a>
<FONT color="green">547</FONT>    <a name="line.547"></a>
<FONT color="green">548</FONT>        /** {@inheritDoc} */<a name="line.548"></a>
<FONT color="green">549</FONT>        @Override<a name="line.549"></a>
<FONT color="green">550</FONT>        public double walkInColumnOrder(final RealMatrixPreservingVisitor visitor)<a name="line.550"></a>
<FONT color="green">551</FONT>            throws MatrixVisitorException {<a name="line.551"></a>
<FONT color="green">552</FONT>            final int rows    = getRowDimension();<a name="line.552"></a>
<FONT color="green">553</FONT>            final int columns = getColumnDimension();<a name="line.553"></a>
<FONT color="green">554</FONT>            visitor.start(rows, columns, 0, rows - 1, 0, columns - 1);<a name="line.554"></a>
<FONT color="green">555</FONT>            for (int j = 0; j &lt; columns; ++j) {<a name="line.555"></a>
<FONT color="green">556</FONT>                for (int i = 0; i &lt; rows; ++i) {<a name="line.556"></a>
<FONT color="green">557</FONT>                    visitor.visit(i, j, data[i][j]);<a name="line.557"></a>
<FONT color="green">558</FONT>                }<a name="line.558"></a>
<FONT color="green">559</FONT>            }<a name="line.559"></a>
<FONT color="green">560</FONT>            return visitor.end();<a name="line.560"></a>
<FONT color="green">561</FONT>        }<a name="line.561"></a>
<FONT color="green">562</FONT>    <a name="line.562"></a>
<FONT color="green">563</FONT>        /** {@inheritDoc} */<a name="line.563"></a>
<FONT color="green">564</FONT>        @Override<a name="line.564"></a>
<FONT color="green">565</FONT>        public double walkInColumnOrder(final RealMatrixChangingVisitor visitor,<a name="line.565"></a>
<FONT color="green">566</FONT>                                        final int startRow, final int endRow,<a name="line.566"></a>
<FONT color="green">567</FONT>                                        final int startColumn, final int endColumn)<a name="line.567"></a>
<FONT color="green">568</FONT>            throws MatrixIndexException, MatrixVisitorException {<a name="line.568"></a>
<FONT color="green">569</FONT>            MatrixUtils.checkSubMatrixIndex(this, startRow, endRow, startColumn, endColumn);<a name="line.569"></a>
<FONT color="green">570</FONT>            visitor.start(getRowDimension(), getColumnDimension(),<a name="line.570"></a>
<FONT color="green">571</FONT>                          startRow, endRow, startColumn, endColumn);<a name="line.571"></a>
<FONT color="green">572</FONT>            for (int j = startColumn; j &lt;= endColumn; ++j) {<a name="line.572"></a>
<FONT color="green">573</FONT>                for (int i = startRow; i &lt;= endRow; ++i) {<a name="line.573"></a>
<FONT color="green">574</FONT>                    final double[] rowI = data[i];<a name="line.574"></a>
<FONT color="green">575</FONT>                    rowI[j] = visitor.visit(i, j, rowI[j]);<a name="line.575"></a>
<FONT color="green">576</FONT>                }<a name="line.576"></a>
<FONT color="green">577</FONT>            }<a name="line.577"></a>
<FONT color="green">578</FONT>            return visitor.end();<a name="line.578"></a>
<FONT color="green">579</FONT>        }<a name="line.579"></a>
<FONT color="green">580</FONT>    <a name="line.580"></a>
<FONT color="green">581</FONT>        /** {@inheritDoc} */<a name="line.581"></a>
<FONT color="green">582</FONT>        @Override<a name="line.582"></a>
<FONT color="green">583</FONT>        public double walkInColumnOrder(final RealMatrixPreservingVisitor visitor,<a name="line.583"></a>
<FONT color="green">584</FONT>                                        final int startRow, final int endRow,<a name="line.584"></a>
<FONT color="green">585</FONT>                                        final int startColumn, final int endColumn)<a name="line.585"></a>
<FONT color="green">586</FONT>            throws MatrixIndexException, MatrixVisitorException {<a name="line.586"></a>
<FONT color="green">587</FONT>            MatrixUtils.checkSubMatrixIndex(this, startRow, endRow, startColumn, endColumn);<a name="line.587"></a>
<FONT color="green">588</FONT>            visitor.start(getRowDimension(), getColumnDimension(),<a name="line.588"></a>
<FONT color="green">589</FONT>                          startRow, endRow, startColumn, endColumn);<a name="line.589"></a>
<FONT color="green">590</FONT>            for (int j = startColumn; j &lt;= endColumn; ++j) {<a name="line.590"></a>
<FONT color="green">591</FONT>                for (int i = startRow; i &lt;= endRow; ++i) {<a name="line.591"></a>
<FONT color="green">592</FONT>                    visitor.visit(i, j, data[i][j]);<a name="line.592"></a>
<FONT color="green">593</FONT>                }<a name="line.593"></a>
<FONT color="green">594</FONT>            }<a name="line.594"></a>
<FONT color="green">595</FONT>            return visitor.end();<a name="line.595"></a>
<FONT color="green">596</FONT>        }<a name="line.596"></a>
<FONT color="green">597</FONT>    <a name="line.597"></a>
<FONT color="green">598</FONT>        /**<a name="line.598"></a>
<FONT color="green">599</FONT>         * Returns a fresh copy of the underlying data array.<a name="line.599"></a>
<FONT color="green">600</FONT>         *<a name="line.600"></a>
<FONT color="green">601</FONT>         * @return a copy of the underlying data array.<a name="line.601"></a>
<FONT color="green">602</FONT>         */<a name="line.602"></a>
<FONT color="green">603</FONT>        private double[][] copyOut() {<a name="line.603"></a>
<FONT color="green">604</FONT>            final int nRows = this.getRowDimension();<a name="line.604"></a>
<FONT color="green">605</FONT>            final double[][] out = new double[nRows][this.getColumnDimension()];<a name="line.605"></a>
<FONT color="green">606</FONT>            // can't copy 2-d array in one shot, otherwise get row references<a name="line.606"></a>
<FONT color="green">607</FONT>            for (int i = 0; i &lt; nRows; i++) {<a name="line.607"></a>
<FONT color="green">608</FONT>                System.arraycopy(data[i], 0, out[i], 0, data[i].length);<a name="line.608"></a>
<FONT color="green">609</FONT>            }<a name="line.609"></a>
<FONT color="green">610</FONT>            return out;<a name="line.610"></a>
<FONT color="green">611</FONT>        }<a name="line.611"></a>
<FONT color="green">612</FONT>    <a name="line.612"></a>
<FONT color="green">613</FONT>        /**<a name="line.613"></a>
<FONT color="green">614</FONT>         * Replaces data with a fresh copy of the input array.<a name="line.614"></a>
<FONT color="green">615</FONT>         * &lt;p&gt;<a name="line.615"></a>
<FONT color="green">616</FONT>         * Verifies that the input array is rectangular and non-empty.&lt;/p&gt;<a name="line.616"></a>
<FONT color="green">617</FONT>         *<a name="line.617"></a>
<FONT color="green">618</FONT>         * @param in data to copy in<a name="line.618"></a>
<FONT color="green">619</FONT>         * @throws IllegalArgumentException if input array is empty or not<a name="line.619"></a>
<FONT color="green">620</FONT>         *    rectangular<a name="line.620"></a>
<FONT color="green">621</FONT>         * @throws NullPointerException if input array is null<a name="line.621"></a>
<FONT color="green">622</FONT>         */<a name="line.622"></a>
<FONT color="green">623</FONT>        private void copyIn(final double[][] in) {<a name="line.623"></a>
<FONT color="green">624</FONT>            setSubMatrix(in, 0, 0);<a name="line.624"></a>
<FONT color="green">625</FONT>        }<a name="line.625"></a>
<FONT color="green">626</FONT>    <a name="line.626"></a>
<FONT color="green">627</FONT>    }<a name="line.627"></a>




























































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